.image-preview-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  flex-direction: column;
  background: rgba(0, 0, 0, .92);
  color: #fff;
}

.image-preview-overlay.open { display: flex; }

.image-preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 58px;
  padding: 8px 12px;
  box-sizing: border-box;
}

.image-preview-toolbar button {
  min-width: 40px;
  min-height: 40px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, .35);
  border-radius: 6px;
  background: rgba(255, 255, 255, .14);
  color: #fff;
  font: inherit;
  cursor: pointer;
}

.image-preview-toolbar button:hover,
.image-preview-toolbar button:focus-visible { background: rgba(255, 255, 255, .3); }
.image-preview-zoom { min-width: 50px; text-align: center; }

.image-preview-stage {
  display: flex;
  flex: 1;
  min-height: 0;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  touch-action: none;
}

.image-preview-stage.can-pan { cursor: grab; }
.image-preview-stage.can-pan:active { cursor: grabbing; }

.image-preview-image {
  display: block;
  max-width: calc(100vw - 32px);
  max-height: calc(100vh - 90px);
  object-fit: contain;
  transform-origin: center center;
  user-select: none;
  -webkit-user-select: none;
}

.chat-image-preview-trigger:focus-visible { outline: 3px solid #1677ff; outline-offset: 3px; }